Lead Carbonate Precipitation

Pb(NO3)2 + Na2CO3 → PbCO3↓ + 2NaNO3

Übersicht

Lead nitrate reacts with sodium carbonate to form a white precipitate of lead carbonate (Ksp = 7.4 × 10⁻¹⁴). Basic lead carbonate (2PbCO₃·Pb(OH)₂), known as white lead, was the most important white pigment for millennia until its toxicity led to replacement by titanium dioxide.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Sodium Carbonate Na₂CO₃ 1 (aq)
Produkt Sodium Nitrate NaNO₃ 2 (aq)

Alltägliches Beispiel

White lead paint was used in homes for centuries before being banned due to lead poisoning, especially dangerous for children.

Industrielle Bedeutung

Lead carbonate (white lead) has been replaced by TiO₂ in paint. Understanding lead precipitation is important for lead contamination remediation.

Eigenschaften

Typ
Precipitation
Reversibel
Nein
Energie
Exotherm
ΔH
-22,0 kJ/mol

Verwandte Reaktionen

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Magnesium Hydroxide Precipitation Copper Sulfide Precipitation Cobalt(II) Hydroxide Precipitation Mercury(II) Sulfide Precipitation (Vermilion) Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Lead Carbonate Precipitation?
The balanced equation is: Pb(NO₃)₂ + Na₂CO₃ → PbCO₃↓ + 2NaNO₃.
What type of reaction is Lead Carbonate Precipitation?
Lead Carbonate Precipitation is a precipitation reaction.
Is Lead Carbonate Precipitation exothermic or endothermic?
Lead Carbonate Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -22.0 kJ/mol.